Date: Fri, 16 Nov 2001 18:14:25 -0500 From: The Anarcat <anarcat@anarcat.dyndns.org> To: FreeBSD Stable Issues <FreeBSD-stable@FreeBSD.ORG> Subject: sshd 2.9 core dumps with UseLogin after upgrade Message-ID: <20011116231425.GA58429@shall.anarcat.dyndns.org>
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--oJ71EGRlYNjSvfq7 Content-Type: multipart/mixed; boundary="wq9mPyueHGvFACwf" Content-Disposition: inline --wq9mPyueHGvFACwf Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi. I just upgraded a -stable system from 2001.09.14 to 2001.11.15. When I log into the box, I see this in my logs. /kernel: pid 58148 (sshd), uid 0: exited on signal 11 sshd[58147]: error: fcntl(4, F_SETFL, O_NONBLOCK): Resource temporarily unavailable sshd keeps on taking connections (it's the child that's dying...) This behavior disappears when I remove the UseLogin yes option from my config file. Debug run is available as attachment. And unfortunatly, sshd doesn't core dump (why?) anymore so I can't get a stack trace... But I have one from another machine, so I still attach a gdb backtrace. A. --wq9mPyueHGvFACwf Content-Type: text/plain; charset=us-ascii Content-Description: Logs from -ddde run Content-Disposition: attachment; filename="server.log" Content-Transfer-Encoding: quoted-printable debug1: sshd version OpenSSH_2.9 FreeBSD localisations 20010713 debug1: private host key: #0 type 0 RSA1 debug3: No RSA1 key file /etc/ssh/ssh_host_dsa_key. debug1: read PEM private key done: type DSA debug1: private host key: #1 type 2 DSA debug1: Bind to port 22 on ::. Server listening on :: port 22. debug1: Bind to port 22 on 0.0.0.0. Server listening on 0.0.0.0 port 22. debug1: Server will not fork when running in debugging mode. Connection from localhost port 1251 Connection from ::1 port 1251 debug1: Client protocol version 2.0; client software version OpenSSH_2.9 Fr= eeBSD localisations 20010713 debug1: match: OpenSSH_2.9 FreeBSD localisations 20010713 pat ^OpenSSH Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_2.9 FreeBSD localisations 2001= 0713 debug1: Rhosts Authentication disabled, originating port not trusted. debug1: list_hostkey_types: ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellma= n-group1-sha1 debug2: kex_parse_kexinit: ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arc= four,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,= rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arc= four,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,= rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160= @openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160= @openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit:=20 debug2: kex_parse_kexinit:=20 debug2: kex_parse_kexinit: first_kex_follows 0=20 debug2: kex_parse_kexinit: reserved 0=20 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellma= n-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arc= four,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,= rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arc= four,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,= rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160= @openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160= @openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none debug2: kex_parse_kexinit: none debug2: kex_parse_kexinit:=20 debug2: kex_parse_kexinit:=20 debug2: kex_parse_kexinit: first_kex_follows 0=20 debug2: kex_parse_kexinit: reserved 0=20 debug2: mac_init: found hmac-md5 debug1: kex: client->server aes128-cbc hmac-md5 none debug2: mac_init: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: dh_gen_key: priv key bits set: 124/256 debug1: bits set: 1059/2049 debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: bits set: 1023/2049 debug1: sig size 20 20 debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: kex_derive_keys debug1: newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: waiting for SSH2_MSG_NEWKEYS debug1: newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug3: Trying to reverse map address ::1. debug1: userauth-request for user anarcat service ssh-connection method none debug1: attempt 0 failures 0 debug2: input_userauth_request: setting up authctxt for anarcat debug1: Starting up PAM with username "anarcat" debug2: input_userauth_request: try method none Failed none for anarcat from ::1 port 1251 ssh2 debug1: userauth-request for user anarcat service ssh-connection method pub= lickey debug1: attempt 1 failures 1 debug2: input_userauth_request: try method publickey debug1: test whether pkalg/pkblob are acceptable debug1: temporarily_use_uid: 1000/1000 (e=3D0) debug1: restore_uid debug2: userauth_pubkey: authenticated 0 pkalg ssh-dss Failed publickey for anarcat from ::1 port 1251 ssh2 debug1: userauth-request for user anarcat service ssh-connection method pub= lickey debug1: attempt 2 failures 2 debug2: input_userauth_request: try method publickey debug1: test whether pkalg/pkblob are acceptable debug1: temporarily_use_uid: 1000/1000 (e=3D0) debug1: restore_uid debug2: userauth_pubkey: authenticated 0 pkalg ssh-dss Failed publickey for anarcat from ::1 port 1251 ssh2 debug1: userauth-request for user anarcat service ssh-connection method pas= sword debug1: attempt 3 failures 3 debug2: input_userauth_request: try method password debug1: PAM Password authentication accepted for user "anarcat" debug1: PAM setting rhost to "localhost" Accepted password for anarcat from ::1 port 1251 ssh2 debug1: Entering interactive session for SSH2. debug1: server_init_dispatch_20 debug1: server_input_channel_open: ctype session rchan 0 win 32768 max 16384 debug1: input_session_request debug1: channel 0: new [server-session] debug1: session_new: init debug1: session_new: session 0 debug1: session_open: channel 0 debug1: session_open: session 0: link with channel 0 debug1: server_input_channel_open: confirm session debug2: callback start debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 channel 0 request pty-req repl= y 0 debug1: session_pty_req: session 0 alloc /dev/ttyp5 debug2: tty_parse_modes: SSH2 n_bytes 251 debug2: tty_parse_modes: ospeed 38400 debug2: tty_parse_modes: ispeed 38400 debug2: callback done debug2: callback start debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 channel 0 request shell reply 0 debug1: PAM setting tty to "/dev/ttyp5" debug1: do_pam_session: euid 0, uid 0 debug1: PAM establishing creds debug1: channel 0: rfd 4 isatty debug1: fd 4 setting O_NONBLOCK debug1: fd 3 IS O_NONBLOCK debug2: callback done debug1: Setting controlling tty using TIOCSCTTY. debug1: Received SIGCHLD. debug3: tvp!=3DNULL kid 1 mili 100 debug1: session_by_pid: pid 58305 debug1: session_exit_message: session 0 channel 0 pid 58305 debug1: session_exit_message: release channel 0 debug1: channel 0: write failed debug1: channel 0: output open -> closed debug1: channel 0: close_write debug1: session_pty_cleanup: session 0 release /dev/ttyp5 debug1: session_free: session 0 pid 58305 debug1: channel 0: read<=3D0 rfd 4 len 0 debug1: channel 0: read failed debug1: channel 0: input open -> drain debug1: channel 0: close_read debug1: channel 0: input: no drain shortcut debug1: channel 0: ibuf empty debug1: channel 0: input drain -> closed debug1: channel 0: send eof debug1: channel 0: send close debug2: channel 0: no data after CLOSE debug2: channel 0: no data after CLOSE debug1: channel 0: rcvd close debug2: channel 0: no data after CLOSE debug1: channel 0: is dead debug1: channel_free: channel 0: status: The following connections are open: #0 server-session (t4 r0 i8/0 o128/0 fd -1/-1) Connection closed by remote host. Closing connection to ::1 --wq9mPyueHGvFACwf Content-Type: text/plain; charset=us-ascii Content-Description: backtrace Content-Disposition: attachment; filename=test su-2.05# gdb `which sshd` sshd.core GNU gdb 4.18 Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-unknown-freebsd"... (no debugging symbols found)... Core was generated by `sshd'. Program terminated with signal 11, Segmentation fault. Reading symbols from /usr/lib/libopie.so.2...(no debugging symbols found)... done. Reading symbols from /usr/lib/libmd.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib/libcrypt.so.2...(no debugging symbols found)... done. Reading symbols from /usr/lib/libcrypto.so.2...(no debugging symbols found)... done. Reading symbols from /usr/lib/libutil.so.3...(no debugging symbols found)... done. Reading symbols from /usr/lib/libz.so.2...(no debugging symbols found)...done. Reading symbols from /usr/lib/libwrap.so.3...(no debugging symbols found)... done. Reading symbols from /usr/lib/libpam.so.1...(no debugging symbols found)... ---Type <return> to continue, or q <return> to quit--- done. Reading symbols from /usr/lib/libc.so.4...(no debugging symbols found)...done. Reading symbols from /usr/lib/pam_skey.so...(no debugging symbols found)... done. Reading symbols from /usr/lib/libskey.so.2...(no debugging symbols found)... done. Reading symbols from /usr/lib/pam_unix.so...(no debugging symbols found)... done. Reading symbols from /usr/lib/pam_permit.so... (no debugging symbols found)... done. Reading symbols from /usr/libexec/ld-elf.so.1...(no debugging symbols found)... done. #0 0x281fc4a7 in strncmp () from /usr/lib/libc.so.4 (gdb) bt #0 0x281fc4a7 in strncmp () from /usr/lib/libc.so.4 #1 0xbfbfed7c in ?? () #2 0x8056e35 in getsockname () #3 0x8056049 in getsockname () #4 0x8057e12 in getsockname () #5 0x8057ffa in getsockname () #6 0x8064909 in xstrdup () #7 0x805e777 in getsockname () #8 0x80518a3 in getsockname () #9 0x8051e91 in getsockname () #10 0x8058643 in getsockname () #11 0x80553ed in getsockname () #12 0x8053543 in getsockname () #13 0x804dbc3 in getsockname () #14 0x804c0c5 in getsockname () (gdb) --wq9mPyueHGvFACwf-- --oJ71EGRlYNjSvfq7 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjv1ndAACgkQttcWHAnWiGfHagCcD6y8i8G9t60kVrBFbBd7O+Ir XDkAoJXpYx4cx7KiLTOCCdQFUspSgdvY =I7Fx -----END PGP SIGNATURE----- --oJ71EGRlYNjSvfq7-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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